CN108929616B - Metal substrate graphene modified long-acting anticorrosive paint and preparation method thereof - Google Patents
Metal substrate graphene modified long-acting anticorrosive paint and preparation method thereof Download PDFInfo
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- CN108929616B CN108929616B CN201810776207.6A CN201810776207A CN108929616B CN 108929616 B CN108929616 B CN 108929616B CN 201810776207 A CN201810776207 A CN 201810776207A CN 108929616 B CN108929616 B CN 108929616B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
Abstract
The invention belongs to the technical field of anticorrosive coatings, and particularly relates to a metal substrate graphene modified long-acting anticorrosive paint and a preparation method thereof. The composition comprises A, B two components, wherein the component A comprises the following raw materials in parts by weight: 40-50 parts of epoxy resin, 10-20 parts of modified graphene, 15-20 parts of pigment, 15-20 parts of cosolvent, 0.3-0.8 part of defoamer, 0.3-0.8 part of flatting agent, 0.5-1 part of anti-settling agent and 0.5-1 part of dispersant; the component B comprises the following raw materials in parts by weight: 50-60 parts of etherified amino resin, 25-35 parts of phenolic aldehyde amine and 20-30 parts of cosolvent. The metal substrate graphene modified long-acting anticorrosive paint disclosed by the invention has the advantages of long-term excellent anticorrosive performance, strong substrate adhesion, high mechanical strength, excellent friction resistance, excellent salt spray resistance, better water resistance, chemical resistance, oil resistance and impact resistance, strong construction adaptability and the like; the operation method is simple, the operation is easy, the cost of raw materials and energy consumption is low, the environment is protected, no pollution is caused, the coating film is quick to dry, and the construction period is short.
Description
Technical Field
The invention belongs to the technical field of anticorrosive coatings, and particularly relates to a metal substrate graphene modified long-acting anticorrosive paint and a preparation method thereof.
Background
Corrosion of metals is the phenomenon in which metals are destroyed by chemical or electrochemical action of the surrounding medium. The corrosion of metal is spread in various fields of national economy, and great loss is brought to the national economy. In industrially developed countries, direct economic losses due to corrosion account for 1% to 4% of the total value of national economy, and approximately 20% of the annual output of steel rusted by corrosion, with approximately 30% of the equipment scrapped due to corrosion. In China, the economic loss caused by metal corrosion is over 300 million yuan each year, and accounts for 4 percent of the total value of national production. For a long time, various techniques have been used to protect metals from corrosion. Among them, one of the most effective and commonly used methods for preventing corrosion of metal equipment is to apply an anticorrosive coating to the metal surface to isolate the corrosive medium from the metal substrate. The anticorrosive paint is similar to other paint in that its composition mainly includes base material (resin), pigment and filler and solvent. The main function and requirement of the metal anticorrosive paint are that the paint has good adhesive force to metal base materials and has antirust performance; can prevent the influence of harmful corrosive media in the external environment, such as oxygen, water vapor, sulfur dioxide and chemical atmosphere, and has beautiful and decorative properties.
The graphene maintains the inherent characteristics of the carbon material, has stable chemical properties, has a large van der Waals attractive force between layers due to a special large-pi-bond conjugated electronic structure, is easy to agglomerate and pack again between the layers, and has weak interaction capacity with other media due to an inert surface. The completeness of the graphene carbon structure makes infiltration between the graphene carbon structure and a resin matrix difficult to realize, and greatly restricts the development of graphene in the field of resin matrix composite materials and the final performance of the composite materials. The graphene oxide is an important derivative of graphene, and because the surface of the graphene oxide is rich in oxygen-containing groups including hydroxyl, carboxyl, epoxy and the like, the graphene oxide is very easy to absorb water and can be dispersed into a stable micellar solution in an aqueous solution system. And the surface groups of the organic phase can be used for modification, so that the dispersibility of the organic phase in the organic phase is improved, and the application field is expanded. Graphene is a carbon thin plate with only one atomic thickness, when contacting water or steam, the coating containing graphene plays a role of a molecular sieve, small molecules below a certain size are allowed to pass through, tens of millions of tiny flakes are arranged inside the coating and stacked together in a disordered way, and nano-sized capillary gaps are reserved between the tiny flakes and the coating, so that the contact between the water or the steam and the metal surface is greatly prevented, the effect of completely isolating the metal surface is achieved, and the effect of protecting the metal is achieved. Meanwhile, the graphene coating is more firm in mechanics and completely impermeable to gas, liquid and chemicals, so that the graphene coating has excellent strong acid and alkali resistance.
The ring formed by two carbon atoms and one oxygen atom is called an epoxy group, and compounds containing such three-membered rings are collectively called epoxy compounds. The simplest epoxy compound is ethylene oxide. While ethylene oxide can be polymerized by ionic polymerization to give thermoplastic polyethylene oxide resins, known as epoxy resins. It is a generic name of compounds which contain two or more epoxy groups in one molecule and are capable of forming a three-dimensional crosslinked network-like cured product in the presence of an appropriate curing agent. The epoxy resin has excellent performances such as adhesion, corrosion resistance, formability, thermal stability and the like, and is very superior in mechanical, thermal, electrical and chemical resistance. However, in the existing anticorrosive paint, as the main chain in the film-forming material is composed of C-C bonds, the chemical bonds are easy to break under the irradiation of ultraviolet light, so that the anticorrosive function is lost, and the anticorrosive life is short; therefore, the development of long-acting anticorrosive coatings is an important direction of current coating research, and the key is to prepare high-performance resin and high-performance long-acting anticorrosive additives.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the metal substrate graphene modified long-acting anticorrosive paint which has the advantages of long-term excellent anticorrosive performance, strong substrate adhesion, high mechanical strength, excellent salt spray resistance, better water resistance, chemical resistance, oil resistance, impact resistance, strong construction adaptability and the like. The invention also provides a preparation method of the metal substrate graphene modified long-acting anticorrosive paint.
In order to achieve the above object, the present invention provides the following technical solutions:
a metal substrate graphene modified long-acting anticorrosive paint is composed of A, B two components, wherein the weight ratio of the component A to the component B is 100 (25-35);
wherein the component A is prepared from the following raw materials in parts by weight:
40-50 parts of epoxy resin, 10-20 parts of modified graphene, 15-20 parts of pigment, 15-20 parts of cosolvent, 0.3-0.8 part of defoamer, 0.3-0.8 part of flatting agent, 0.5-1 part of anti-settling agent and 0.5-1 part of dispersant;
the component B comprises the following raw materials in parts by weight:
50-60 parts of etherified amino resin, 25-35 parts of phenolic aldehyde amine and 20-30 parts of cosolvent;
further, the epoxy value of the epoxy resin is 0.20-0.56.
Further, the structure of the modified graphene is as follows:
further, the pigment is one of rutile type titanium dioxide, phthalocyanine blue, high pigment carbon black or carbazole violet pigment subjected to hydrogenated rosin surface treatment, and the pigment fineness is lower than 300 nm.
Further, the cosolvent is one or more of cyclohexanone, butanol, isopropanol and xylene.
Further, the defoaming agent is a fluorine modified siloxane defoaming agent, is selected from BYK066N of Pico chemistry, the leveling agent is a fluorine modified acrylic polymer, EFKA3777 of Ciba corporation and the anti-settling agent are polyamide wax slurry, is selected from Disjoron 6900-20X, and the dispersing agent is a copolymer solution containing no ethoxy alkylphenol, and is selected from Digao TEGO Dispers 685.
Further, the etherified amino resin is a mixture of methylated amino resin and isobutanol etherified amino resin according to the mass ratio of 3: 1.
A preparation method of a metal substrate graphene modified long-acting anticorrosive paint specifically comprises the following preparation methods:
preparing modified graphene:
(1) placing 10 parts of graphene in 90-100 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 20-30 parts of potassium permanganate and 80-90 parts of deionized water, raising the temperature to 80-90 ℃, and stirring for reaction for 1-2 hours; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(2) dispersing 5-10 parts of graphene oxide obtained in the step (1) in 90-100 parts of absolute ethyl alcohol, and transferring the graphene oxide into a reaction container after ultrasonic treatment for 1-2 hours; adding 10-20 parts of 3-ureidopropyltrimethoxysilane under the protection of nitrogen, stirring, refluxing, reacting for 12 hours, filtering and washing the obtained mixed solution with water, ethanol and methanol respectively twice, and freeze-drying to obtain functionalized graphene oxide;
(3) under the protection of nitrogen, 10-15 parts of zinc sulfate is dissolved in 50-60 parts of methanol solvent, 5-10 parts of functionalized graphene oxide prepared in the step (2) is added, the temperature is raised to 50 ℃, the mixture is continuously stirred for 30min, the mixture is cooled to room temperature, and the modified graphene is obtained by filtering, wherein the reaction equation is as follows:
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight component ratio, and putting all components of modified graphene and pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1200-1300r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in a container according to the weight parts of the formula, fully and uniformly stirring at the rotation speed of 1000-;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100 to 25-35, and are uniformly stirred to the construction viscosity, so that the long-acting anticorrosive paint for the metal base material is obtained.
Further, the temperature of the grinding dispersion is 35-40 ℃, and the fineness after grinding is less than or equal to 30 um.
The invention has the following beneficial effects:
(1) compared with the traditional amine curing agent, the selected curing agent component has the characteristics of small smell, low toxicity, short curing time of acting epoxy resin, capability of curing a wet base layer even underwater, high mechanical strength of a cured paint film, super corrosion resistance and super weather resistance outdoor service life.
(2) According to the metal substrate graphene modified long-acting anticorrosive paint and the preparation method thereof, siloxane is grafted to the surface of a graphene two-position structure, so that the distance between graphene layers is changed to a certain extent, and the dispersion uniformity of graphene in epoxy resin is greatly improved.
(3) According to the metal substrate graphene modified long-acting anticorrosive paint and the preparation method thereof, the two-dimensional graphene has a nano-size effect, and a paint film can form a compact coating after being cured on the surface of an alloy, so that the contact of water, oil or steam with the surface of the alloy is greatly prevented, the isolation effect is completely achieved, and the effect of protecting metals is achieved.
(4) According to the metal matrix graphene modified long-acting anticorrosive paint and the preparation method thereof, disclosed by the invention, usually, an organic small molecular zinc complex or a zinc oxide is simply doped into a matrix, so that a plurality of defects exist in practical application, such as poor mechanical property, poor thermal stability and poor compatibility between processability and the matrix. The selected 3-ureidopropyltrimethoxysilane has strong complexing ability with zinc ions, not only has unique corrosion resistance of the zinc ions, but also has good absorption effect on ultraviolet rays due to carbon-oxygen double bonds, and simultaneously has good mechanical property and chemical stability due to silicon-oxygen bonds in the structure, good processing property and substrate compatibility, can form a compact corrosion-resistant coating synergistic effect with graphene, and has strong binding ability, double corrosion resistance and stronger corrosion resistance.
(5) According to the metal substrate graphene modified long-acting anticorrosive paint and the preparation method thereof, the selected pigment has good filling property and dispersibility in a paint film after surface modification, the fineness of the pigment is lower than 300nm, so that the anticorrosive paint has good tinting strength and weather fastness, and has excellent solvent resistance under the synergistic effect with graphene.
(6) The metal substrate graphene modified long-acting anticorrosive paint and the preparation method thereof have the advantages of long-term excellent anticorrosive performance, strong substrate adhesion, high mechanical strength, excellent friction resistance, excellent salt spray resistance, better water resistance, chemical resistance, oil resistance and impact resistance, strong construction adaptability and the like; the operation method is simple, the operation is easy, the cost of raw materials and energy consumption is low, the environment is protected, no pollution is caused, the coating film is quick to dry, and the construction period is short.
Detailed Description
The present invention will now be described in further detail with reference to examples.
Example 1
A metal substrate graphene modified long-acting anticorrosive paint is composed of A, B two components, wherein the weight ratio of the component A to the component B is 100: 30;
wherein the component A is prepared from the following raw materials in parts by weight:
45 parts of epoxy resin with the epoxy value of 0.35, 15 parts of modified graphene, 15 parts of rutile type titanium dioxide with the fineness of 50nm, 20 parts of cyclohexanone, 0.5 part of defoaming agent BYK066N 0.5, 0.5 part of a flatting agent EFKA37770.5 part selected from Bike chemical company, 0.8 part of an anti-settling agent 6900-20X, 0.8 part selected from Disbaron company, a dispersant TEGO Dispers 6850.8 part selected from Digao company;
the component B comprises the following raw materials in parts by weight:
55 parts of etherified amino resin, 30 parts of phenolic aldehyde amine and 30 parts of cyclohexanone are formed by mass ratio of 3:1 by the methylated amino resin and the isobutanol etherified amino resin;
a preparation method of a metal substrate graphene modified long-acting anticorrosive paint specifically comprises the following preparation methods:
preparing modified graphene:
(1) placing 10 parts of graphene in 100 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 30 parts of potassium permanganate and 90 parts of deionized water, raising the temperature to 90 ℃, and stirring for reacting for 1 hour; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(2) dispersing 8 parts of graphene oxide obtained in the step (1) in 95 parts of absolute ethyl alcohol, and transferring the graphene oxide into a reaction container after ultrasonic treatment for 1-2 hours; adding 15 parts of 3-urea propyl trimethoxy silane under the protection of nitrogen, stirring, refluxing, reacting for 12 hours, filtering and washing the obtained mixed solution with water, ethanol and methanol respectively twice, and freeze-drying to obtain functionalized graphene oxide;
(3) under the protection of nitrogen, taking 15 parts of zinc sulfate, dissolving in 60 parts of methanol solvent, adding 10 parts of the functionalized graphene oxide prepared in the step (2), raising the temperature to 50 ℃, continuing stirring for 30min, cooling to room temperature, and filtering to obtain modified graphene;
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight component ratio, and putting all components of modified graphene and pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing, wherein the grinding and dispersing temperature is 40 ℃, and the fineness after grinding is less than or equal to 30 um;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1300r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in a container according to the weight parts of the formula, fully and uniformly stirring at the rotating speed of 1200r/min, filtering to obtain a component B curing agent, and packaging for later use;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100:30, and are uniformly stirred to the construction viscosity, so that the long-acting anticorrosive paint for the metal base material is obtained.
Example 2
A metal substrate graphene modified long-acting anticorrosive paint is composed of A, B two components, wherein the weight ratio of the component A to the component B is 100: 35;
wherein the component A is prepared from the following raw materials in parts by weight:
40 parts of epoxy resin with the epoxy value of 0.56, 10 parts of modified graphene, 18 parts of phthalocyanine blue with the fineness of 100nm, 18 parts of butanol, 0.8 part of defoaming agent BYK066N 0.8, selected from Pic chemical company, leveling agent EFKA 37770.3 parts, selected from Ciba company, anti-settling agent 6900-20X 1 parts, selected from Disbaron company, dispersant TEGO Dispers 6851 parts and selected from Digao company;
the component B comprises the following raw materials in parts by weight:
60 parts of etherified amino resin, 25 parts of phenolic aldehyde amine and 25 parts of butanol are formed by the mass ratio of 3:1 of methylated amino resin and isobutanol etherified amino resin;
a preparation method of a metal substrate graphene modified long-acting anticorrosive paint specifically comprises the following preparation methods:
preparing modified graphene:
(1) placing 10 parts of graphene in 100 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 30 parts of potassium permanganate and 90 parts of deionized water, raising the temperature to 90 ℃, and stirring for reacting for 1 hour; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(2) dispersing 8 parts of graphene oxide obtained in the step (1) in 95 parts of absolute ethyl alcohol, and transferring the graphene oxide into a reaction container after ultrasonic treatment for 1-2 hours; adding 15 parts of 3-urea propyl trimethoxy silane under the protection of nitrogen, stirring, refluxing, reacting for 12 hours, filtering and washing the obtained mixed solution with water, ethanol and methanol respectively twice, and freeze-drying to obtain functionalized graphene oxide;
(3) under the protection of nitrogen, dissolving 12 parts of zinc sulfate in 60 parts of methanol solvent, adding 8 parts of the functionalized graphene oxide prepared in the step (2), raising the temperature to 50 ℃, continuing stirring for 30min, cooling to room temperature, and filtering to obtain modified graphene;
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight component ratio, and putting all components of modified graphene and pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing, wherein the grinding and dispersing temperature is 35 ℃, and the fineness after grinding is less than or equal to 30 um;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1200r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in a container according to the weight parts of the formula, fully and uniformly stirring at the rotating speed of 1000r/min, filtering to obtain a component B curing agent, and packaging for later use;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100:35 and are uniformly stirred to the construction viscosity, and the long-acting anticorrosive paint for the metal base material is obtained.
Example 3
A metal substrate graphene modified long-acting anticorrosive paint is composed of A, B two components, wherein the weight ratio of the component A to the component B is 100: 25;
wherein the component A is prepared from the following raw materials in parts by weight:
50 parts of epoxy resin with the epoxy value of 0.20, 20 parts of modified graphene, 20 parts of high-pigment carbon black with the fineness of 200nm, 15 parts of isopropanol, 0.3 part of defoaming agent BYK066N 0.3, 0.5 part of leveling agent EFKA 37770.8 part selected from Bike chemical company, 0.5 part of anti-settling agent 6900-20X, 0.5 part selected from Disbaron company, 6851 part of dispersant TEGO Dispers and Digao company;
the component B comprises the following raw materials in parts by weight:
50 parts of etherified amino resin, 35 parts of phenolic aldehyde amine and 30 parts of isopropanol are formed by the mass ratio of 3: 1;
a preparation method of a metal substrate graphene modified long-acting anticorrosive paint specifically comprises the following preparation methods:
preparing modified graphene:
(1) placing 10 parts of graphene in 90 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 20 parts of potassium permanganate and 80 parts of deionized water, raising the temperature to 80 ℃, and stirring for reacting for 2 hours; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(2) dispersing 8 parts of graphene oxide obtained in the step (1) in 95 parts of absolute ethyl alcohol, and transferring the graphene oxide into a reaction container after ultrasonic treatment for 1-2 hours; adding 15 parts of 3-urea propyl trimethoxy silane under the protection of nitrogen, stirring, refluxing, reacting for 12 hours, filtering and washing the obtained mixed solution with water, ethanol and methanol respectively twice, and freeze-drying to obtain functionalized graphene oxide;
(3) under the protection of nitrogen, taking 15 parts of zinc sulfate, dissolving the zinc sulfate in 60 parts of methanol solvent, adding 5 parts of the functionalized graphene oxide prepared in the step (2), raising the temperature to 50 ℃, continuing stirring for 30min, cooling to room temperature, and filtering to obtain modified graphene;
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight component ratio, and putting all components of modified graphene and pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing, wherein the grinding and dispersing temperature is 38 ℃, and the fineness after grinding is less than or equal to 30 um;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which are in the weight of the rest 30 percent of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1250r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in a container according to the weight parts of the formula, fully and uniformly stirring at the rotating speed of 1100r/min, filtering to obtain a component B curing agent, and packaging for later use;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100:25 and are uniformly stirred to the construction viscosity, and the long-acting anticorrosive paint for the metal base material is obtained.
Example 4
A metal substrate graphene modified long-acting anticorrosive paint is composed of A, B two components, wherein the weight ratio of the component A to the component B is 100: 30;
wherein the component A is prepared from the following raw materials in parts by weight:
45 parts of epoxy resin with the epoxy value of 0.50, 18 parts of modified graphene, 15 parts of carbazole violet with the fineness of 250nm, 20 parts of dimethylbenzene, 0.5 part of defoaming agent BYK066N 0.5, selected from Pic chemical company, leveling agent EFKA37770.5 parts, selected from Ciba company, anti-settling agent 6900-20X 1 parts, selected from Disbaron company, dispersant TEGO Dispers 6850.5 parts and selected from Digao company;
the component B comprises the following raw materials in parts by weight:
50 parts of etherified amino resin, 25 parts of phenolic aldehyde amine and 20 parts of isopropanol are formed by the mass ratio of 3: 1;
a preparation method of a metal substrate graphene modified long-acting anticorrosive paint specifically comprises the following preparation methods:
preparing modified graphene:
(1) placing 10 parts of graphene in 95 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 25 parts of potassium permanganate and 85 parts of deionized water, raising the temperature to 85 ℃, and stirring for reacting for 2 hours; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(2) dispersing 5 parts of graphene oxide obtained in the step (1) in 100 parts of absolute ethyl alcohol, and transferring the graphene oxide into a reaction container after ultrasonic treatment for 1-2 hours; adding 10 parts of 3-urea propyl trimethoxy silane under the protection of nitrogen, stirring, refluxing, reacting for 12 hours, filtering and washing the obtained mixed solution with water, ethanol and methanol respectively twice, and freeze-drying to obtain functionalized graphene oxide;
(3) under the protection of nitrogen, dissolving 10 parts of sulfuric acid in 55 parts of methanol solvent, adding 5 parts of the functionalized graphene oxide prepared in the step (2), raising the temperature to 50 ℃, continuing stirring for 30min, cooling to room temperature, and filtering to obtain modified graphene;
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight component ratio, and putting all components of modified graphene and pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing, wherein the grinding and dispersing temperature is 40 ℃, and the fineness after grinding is less than or equal to 30 um;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1300r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in parts by weight in a container according to the formula, fully and uniformly stirring at a rotating speed of 1150r/min, filtering to obtain a component B curing agent, and packaging for later use;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100:30, and are uniformly stirred to the construction viscosity, so that the long-acting anticorrosive paint for the metal base material is obtained.
Comparative examples are compared with example 1, except that:
comparative example 1
A metal substrate graphene modified long-acting anticorrosive paint is composed of A, B two components, wherein the weight ratio of the component A to the component B is 100: 30;
wherein the component A is prepared from the following raw materials in parts by weight:
45 parts of epoxy resin with the epoxy value of 0.35, 15 parts of modified graphene, 15 parts of rutile type titanium dioxide with the fineness of 50nm, 20 parts of cyclohexanone, 0.5 part of defoaming agent BYK066N 0.5, 0.5 part of a flatting agent EFKA37770.5 part selected from Bike chemical company, 0.8 part of an anti-settling agent 6900-20X, 0.8 part selected from Disbaron company, a dispersant TEGO Dispers 6850.8 part selected from Digao company;
the component B comprises the following raw materials in parts by weight:
55 parts of fatty amine and 30 parts of cyclohexanone;
a preparation method of a metal substrate graphene modified long-acting anticorrosive paint specifically comprises the following preparation methods:
preparing modified graphene:
(1) placing 10 parts of graphene in 100 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 30 parts of potassium permanganate and 90 parts of deionized water, raising the temperature to 90 ℃, and stirring for reacting for 1 hour; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(2) dispersing 8 parts of graphene oxide obtained in the step (1) in 95 parts of absolute ethyl alcohol, and transferring the graphene oxide into a reaction container after ultrasonic treatment for 1-2 hours; adding 15 parts of 3-urea propyl trimethoxy silane under the protection of nitrogen, stirring, refluxing, reacting for 12 hours, filtering and washing the obtained mixed solution with water, ethanol and methanol respectively twice, and freeze-drying to obtain functionalized graphene oxide;
(3) under the protection of nitrogen, taking 15 parts of zinc sulfate, dissolving in 60 parts of methanol solvent, adding 10 parts of the functionalized graphene oxide prepared in the step (2), raising the temperature to 50 ℃, continuing stirring for 30min, cooling to room temperature, and filtering to obtain modified graphene;
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight component ratio, and putting all components of modified graphene and pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing, wherein the grinding and dispersing temperature is 40 ℃, and the fineness after grinding is less than or equal to 30 um;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1300r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
putting the aliphatic amine and the cosolvent into a container according to the weight parts of the formula, fully and uniformly stirring at the rotating speed of 1200r/min, filtering to obtain a component B curing agent, and packaging for later use;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100:30, and are uniformly stirred to the construction viscosity, so that the long-acting anticorrosive paint for the metal base material is obtained.
Comparative example 2
The anticorrosive paint for the metal base material consists of A, B components, wherein the weight ratio of the component A to the component B is 100: 30;
wherein the component A is prepared from the following raw materials in parts by weight:
45 parts of epoxy resin with the epoxy value of 0.35, 15 parts of rutile type titanium dioxide with the fineness of 50nm, 20 parts of cyclohexanone, 0.5 part of defoaming agent BYK066N 0.5, 0.5 part of flatting agent EFKA37770.5 part selected from Bicko chemical company, 6900-20X 0.8 part selected from Ciba company, 0.26 part selected from Tego Dispers 6850.8 part selected from Digao company;
the component B comprises the following raw materials in parts by weight:
55 parts of etherified amino resin, 30 parts of phenolic aldehyde amine and 30 parts of cyclohexanone are formed by mass ratio of 3:1 by the methylated amino resin and the isobutanol etherified amino resin;
a preparation method of metal substrate anticorrosive paint specifically comprises the following preparation methods:
preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight ratio, and putting all the components of the pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing, wherein the grinding and dispersing temperature is 40 ℃, and the fineness after grinding is less than or equal to 30 um;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1300r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
(II) preparation of B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in a container according to the weight parts of the formula, fully and uniformly stirring at the rotating speed of 1200r/min, filtering to obtain a component B curing agent, and packaging for later use;
(III) preparing the metal base material anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100:30, and are uniformly stirred to the construction viscosity, so that the long-acting anticorrosive paint for the metal base material is obtained.
Comparative example 3
A metal substrate graphene modified long-acting anticorrosive paint is composed of A, B two components, wherein the weight ratio of the component A to the component B is 100: 30;
wherein the component A is prepared from the following raw materials in parts by weight:
45 parts of epoxy resin with the epoxy value of 0.35, 15 parts of graphene oxide, 15 parts of rutile type titanium dioxide with the fineness of 50nm, 20 parts of cyclohexanone, 0.5 part of defoaming agent BYK066N 0.5, 0.5 part of a flatting agent EFKA37770.5 part selected from Bike chemical company, 0.8 part of an anti-settling agent 6900-20X, 0.8 part selected from Disbaron company, a dispersant TEGO Dispers 6850.8 part selected from Digao company;
the component B comprises the following raw materials in parts by weight:
55 parts of etherified amino resin, 30 parts of phenolic aldehyde amine and 30 parts of cyclohexanone are formed by mass ratio of 3:1 by the methylated amino resin and the isobutanol etherified amino resin;
a preparation method of a metal substrate graphene modified long-acting anticorrosive paint specifically comprises the following preparation methods:
preparing graphene oxide:
placing 10 parts of graphene in 100 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 30 parts of potassium permanganate and 90 parts of deionized water, raising the temperature to 90 ℃, and stirring for reacting for 1 hour; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent by weight, and putting all components of graphene oxide and pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing, wherein the grinding and dispersing temperature is 40 ℃, and the fineness after grinding is less than or equal to 30 um;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1300r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in a container according to the weight parts of the formula, fully and uniformly stirring at the rotating speed of 1200r/min, filtering to obtain a component B curing agent, and packaging for later use;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100:30, and are uniformly stirred to the construction viscosity, so that the long-acting anticorrosive paint for the metal base material is obtained.
Comparative example 4
A metal substrate graphene modified long-acting anticorrosive paint is composed of A, B two components, wherein the weight ratio of the component A to the component B is 100: 30;
wherein the component A is prepared from the following raw materials in parts by weight:
45 parts of epoxy resin with the epoxy value of 0.35, 15 parts of functionalized graphene oxide, 15 parts of rutile type titanium dioxide with the fineness of 50nm, 20 parts of cyclohexanone, 0.5 part of defoaming agent BYK066N 0.5, 0.8 part of flatting agent EFKA37770.5 selected from Bike chemical company, 0.8 part of anti-settling agent 6900-20X selected from Disbaron company, 0.8 part of dispersant TEGODISPERS 6850.8 part selected from Digao company;
the component B comprises the following raw materials in parts by weight:
55 parts of etherified amino resin, 30 parts of phenolic aldehyde amine and 30 parts of cyclohexanone are formed by mass ratio of 3:1 by the methylated amino resin and the isobutanol etherified amino resin;
a preparation method of a metal substrate graphene modified long-acting anticorrosive paint specifically comprises the following preparation methods:
preparing functionalized graphene oxide:
(1) placing 10 parts of graphene in 100 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 30 parts of potassium permanganate and 90 parts of deionized water, raising the temperature to 90 ℃, and stirring for reacting for 1 hour; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(2) dispersing 8 parts of graphene oxide obtained in the step (1) in 95 parts of absolute ethyl alcohol, and transferring the graphene oxide into a reaction container after ultrasonic treatment for 1-2 hours; adding 15 parts of 3-urea propyl trimethoxy silane under the protection of nitrogen, stirring, refluxing, reacting for 12 hours, filtering and washing the obtained mixed solution with water, ethanol and methanol respectively twice, and freeze-drying to obtain functionalized graphene oxide;
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight component ratio, putting all the components of functionalized graphene oxide and pigment together into a stirrer, and uniformly mixing;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing, wherein the grinding and dispersing temperature is 40 ℃, and the fineness after grinding is less than or equal to 30 um;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1300r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in a container according to the weight parts of the formula, fully and uniformly stirring at the rotating speed of 1200r/min, filtering to obtain a component B curing agent, and packaging for later use;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100:30, and are uniformly stirred to the construction viscosity, so that the long-acting anticorrosive paint for the metal base material is obtained.
The performance test is carried out on the long-acting anticorrosion paint for the metal base materials described in examples 1-4 and comparative examples 1-4, and the results are shown in table 1:
TABLE 1
From the data analysis of table 1: the paint films prepared in the embodiments 1 to 4 of the invention have the advantages of excellent performance, long-term excellent anti-corrosion performance, strong adhesion of base materials, high mechanical strength, excellent friction resistance, excellent salt spray resistance, and better water resistance, chemical resistance, oil resistance and impact resistance, while the paint films prepared in the comparative examples 1 to 4 have the defects of curing agent components and main graphene components, so that the performances of the paint films are greatly reduced.
In light of the above-described embodiments of the present invention, it is clear that many modifications and variations can be made by the worker skilled in the art without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The metal substrate graphene modified long-acting anticorrosive paint consists of A, B components, and is characterized in that: the weight ratio of the component A to the component B is 100 (25-35);
wherein the component A is prepared from the following raw materials in parts by weight:
40-50 parts of epoxy resin, 10-20 parts of modified graphene, 15-20 parts of pigment, 15-20 parts of cosolvent, 0.3-0.8 part of defoamer, 0.3-0.8 part of flatting agent, 0.5-1 part of anti-settling agent and 0.5-1 part of dispersant;
the component B comprises the following raw materials in parts by weight:
50-60 parts of etherified amino resin, 25-35 parts of phenolic aldehyde amine and 20-30 parts of cosolvent;
the structure of the modified graphene is as follows:
2. the metal-based graphene-modified long-acting anticorrosive paint according to claim 1, characterized in that: the epoxy value of the epoxy resin is 0.20-0.56.
3. The metal-based graphene-modified long-acting anticorrosive paint according to claim 1, characterized in that: the pigment is one of rutile type titanium dioxide, phthalocyanine blue, high pigment carbon black or carbazole violet pigment subjected to hydrogenated rosin surface treatment, and the pigment fineness is lower than 300 nm.
4. The metal-based graphene-modified long-acting anticorrosive paint according to claim 1, characterized in that: the cosolvent is one or more of cyclohexanone, butanol, isopropanol and xylene.
5. The metal-based graphene-modified long-acting anticorrosive paint according to claim 1, characterized in that: the defoaming agent is BYK066N of Pico chemistry, the leveling agent is EFKA3777 of Ciba, the anti-settling agent is Tescolon 6900-20X, and the dispersing agent is Digao TEGO Dispers 685.
6. The metal-based graphene-modified long-acting anticorrosive paint according to claim 1, characterized in that: the etherified amino resin is a mixture of methylated amino resin and isobutanol etherified amino resin according to the mass ratio of 3: 1.
7. A method for preparing the long-acting anticorrosive paint for metal substrates according to claim 1, which is characterized by comprising the following steps: the preparation method specifically comprises the following steps:
preparing modified graphene:
(1) placing 10 parts of graphene in 90-100 parts of mixed acid solution of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, mechanically stirring for 12 hours under an ice bath condition, slowly adding 20-30 parts of potassium permanganate and 80-90 parts of deionized water, raising the temperature to 80-90 ℃, and stirring for reaction for 1-2 hours; after the reaction is finished, filtering while the reaction is hot, then washing the reaction product to be neutral by using a large amount of deionized water, and drying the reaction product in vacuum at 85 ℃ to obtain graphene oxide;
(2) dispersing 5-10 parts of graphene oxide obtained in the step (1) in 90-100 parts of absolute ethyl alcohol, and transferring the graphene oxide into a reaction container after ultrasonic treatment for 1-2 hours; adding 10-20 parts of 3-ureidopropyltrimethoxysilane under the protection of nitrogen, stirring, refluxing, reacting for 12 hours, filtering and washing the obtained mixed solution with water, ethanol and methanol respectively twice, and freeze-drying to obtain functionalized graphene oxide;
(3) under the protection of nitrogen, 10-15 parts of zinc sulfate is dissolved in 50-60 parts of methanol solvent, 5-10 parts of the functionalized graphene oxide prepared in the step (2) is added, the temperature is raised to 50 ℃, the mixture is continuously stirred for 30min, the mixture is cooled to room temperature, and the modified graphene is obtained after filtration;
(II) preparation of A-component epoxy paint:
(1) firstly, taking 70% of epoxy resin and cosolvent according to the weight component ratio, and putting all components of modified graphene and pigment together into a stirrer to be uniformly mixed;
(2) putting the raw materials uniformly mixed in the step (1) into a sand mill for grinding and dispersing;
(3) putting the raw materials ground and dispersed in the step (2) into a stirring kettle, adding the defoaming agent, the leveling agent, the anti-settling agent and the dispersing agent which account for the rest 30 percent of the weight of the epoxy resin and the cosolvent in the step (1) and the weight of all the components, fully and uniformly stirring at the rotating speed of 1200-1300r/min, filtering, removing mechanical impurities, thus preparing the component A epoxy paint vehicle, and packaging for later use;
and (III) preparation of a B component curing agent:
placing etherified amino resin, phenolic aldehyde amine and cosolvent in a container according to the weight parts of the formula, fully and uniformly stirring at the rotation speed of 1000-;
(IV) preparation of the metal substrate graphene modified long-acting anticorrosive paint:
when in use, the epoxy paint A and the curing agent B are mixed according to the weight ratio of 100 to 25-35, and are uniformly stirred to the construction viscosity, so that the long-acting anticorrosive paint for the metal base material is obtained.
8. The preparation method of the metal substrate graphene modified long-acting anticorrosive paint according to claim 7, characterized by comprising the following steps: the temperature of the grinding dispersion is 35-40 ℃, and the fineness after grinding is less than or equal to 30 um.
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| CN113801539A (en) * | 2021-10-12 | 2021-12-17 | 浙江鱼童新材料股份有限公司 | Preparation method of graphene epoxy resin coating |
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